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Conserved domains on  [gi|727178465|ref|WP_033641944|]
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MULTISPECIES: ribonuclease HI [Serratia]

Protein Classification

ribonuclease H family protein( domain architecture ID 10791836)

ribonuclease H (RNase H) family protein may function as an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner

CATH:  3.30.420.10
EC:  3.1.26.4
Gene Ontology:  GO:0004523|GO:0003676|GO:0000287|GO:0043137
PubMed:  19228197|16232566|2177653|16093691|19228198
SCOP:  4000541

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
rnhA PRK00203
ribonuclease H; Reviewed
 2-151 9.30e-113

ribonuclease H; Reviewed


:

Pssm-ID: 178927 [Multi-domain]  Cd Length: 150  Bit Score: 316.00  E-value: 9.30e-113
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   2 LKQVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSW 81
Cdd:PRK00203   1 MKQVEIYTDGACLGNPGPGGWGAILRYKGHEKELSGGEALTTNNRMELMAAIEALEALKEPCEVTLYTDSQYVRQGITEW 80

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  82 IHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAAGKPTQDDVGY 151
Cdd:PRK00203  81 IHGWKKNGWKTADKKPVKNVDLWQRLDAALKRHQIKWHWVKGHAGHPENERCDELARAGAEEATLEDTGY 150
 
Name Accession Description Interval E-value
rnhA PRK00203
ribonuclease H; Reviewed
 2-151 9.30e-113

ribonuclease H; Reviewed


Pssm-ID: 178927 [Multi-domain]  Cd Length: 150  Bit Score: 316.00  E-value: 9.30e-113
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   2 LKQVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSW 81
Cdd:PRK00203   1 MKQVEIYTDGACLGNPGPGGWGAILRYKGHEKELSGGEALTTNNRMELMAAIEALEALKEPCEVTLYTDSQYVRQGITEW 80

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  82 IHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAAGKPTQDDVGY 151
Cdd:PRK00203  81 IHGWKKNGWKTADKKPVKNVDLWQRLDAALKRHQIKWHWVKGHAGHPENERCDELARAGAEEATLEDTGY 150
RNase_HI_prokaryote_like cd09278
RNase HI family found mainly in prokaryotes; Ribonuclease H (RNase H) is classified into two ...
 4-141 1.40e-95

RNase HI family found mainly in prokaryotes; Ribonuclease H (RNase H) is classified into two evolutionarily unrelated families, type 1 (prokaryotic RNase HI, eukaryotic RNase H1 and viral RNase H) and type 2 (prokaryotic RNase HII and HIII, and eukaryotic RNase H2). RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner. RNase H is involved in DNA replication, repair and transcription. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes and most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site (DEDD), residues and have the same catalytic mechanism and functions in cells. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. Prokaryotic RNase H varies greatly in domain structures and substrate specificities. Prokaryotes and some single-cell eukaryotes do not require RNase H for viability.


Pssm-ID: 260010 [Multi-domain]  Cd Length: 139  Bit Score: 272.05  E-value: 1.40e-95
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   4 QVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSWIH 83
Cdd:cd09278    1 EIVIYTDGACLGNPGPGGWAAVIRYGDHEKELSGGEPGTTNNRMELTAAIEALEALKEPCPVTIYTDSQYVINGITKWIK 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 727178465  84 NWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:cd09278   81 GWKKNGWKTADGKPVKNRDLWQELDALLAGHKVTWEWVKGHAGHPGNERADRLANKAA 138
RnhA COG0328
Ribonuclease HI [Replication, recombination and repair];
3-141 1.03e-82

Ribonuclease HI [Replication, recombination and repair];


Pssm-ID: 440097 [Multi-domain]  Cd Length: 136  Bit Score: 239.36  E-value: 1.03e-82
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   3 KQVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALT--VPCAVTLSTDSQYVRQGITS 80
Cdd:COG0328    1 KMIEIYTDGACRGNPGPGGWGAVIRYGGEEKELSGGLGDTTNNRAELTALIAALEALKelGPCEVEIYTDSQYVVNQITG 80

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 727178465  81 WIHNWKKRGWktadkKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:COG0328   81 WIHGWKKNGW-----KPVKNPDLWQRLDELLARHKVTFEWVKGHAGHPGNERADALANKAL 136
RNase_H pfam00075
RNase H; RNase H digests the RNA strand of an RNA/DNA hybrid. Important enzyme in retroviral ...
 3-141 2.11e-72

RNase H; RNase H digests the RNA strand of an RNA/DNA hybrid. Important enzyme in retroviral replication cycle, and often found as a domain associated with reverse transcriptases. Structure is a mixed alpha+beta fold with three a/b/a layers.


Pssm-ID: 395028 [Multi-domain]  Cd Length: 141  Bit Score: 213.78  E-value: 2.11e-72
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465    3 KQVEIFTDGSCLGNPGPGGYGAILrYKQTEkTFSEGFRL-TTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSW 81
Cdd:pfam00075   2 KAVTVYTDGSCLGNPGPGGAGAVL-YRGHE-NISAPLPGrTTNNRAELQAVIEALKALKSPSKVNIYTDSQYVIGGITQW 79

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 727178465   82 IHNWKKRGWKTADK-KPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:pfam00075  80 VHGWKKNGWPTTSEgKPVKNKDLWQLLKALCKKHQVYWQWVKGHAGNPGNEMADRLAKQGA 140
 
Name Accession Description Interval E-value
rnhA PRK00203
ribonuclease H; Reviewed
 2-151 9.30e-113

ribonuclease H; Reviewed


Pssm-ID: 178927 [Multi-domain]  Cd Length: 150  Bit Score: 316.00  E-value: 9.30e-113
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   2 LKQVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSW 81
Cdd:PRK00203   1 MKQVEIYTDGACLGNPGPGGWGAILRYKGHEKELSGGEALTTNNRMELMAAIEALEALKEPCEVTLYTDSQYVRQGITEW 80

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  82 IHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAAGKPTQDDVGY 151
Cdd:PRK00203  81 IHGWKKNGWKTADKKPVKNVDLWQRLDAALKRHQIKWHWVKGHAGHPENERCDELARAGAEEATLEDTGY 150
RNase_HI_prokaryote_like cd09278
RNase HI family found mainly in prokaryotes; Ribonuclease H (RNase H) is classified into two ...
 4-141 1.40e-95

RNase HI family found mainly in prokaryotes; Ribonuclease H (RNase H) is classified into two evolutionarily unrelated families, type 1 (prokaryotic RNase HI, eukaryotic RNase H1 and viral RNase H) and type 2 (prokaryotic RNase HII and HIII, and eukaryotic RNase H2). RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner. RNase H is involved in DNA replication, repair and transcription. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes and most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site (DEDD), residues and have the same catalytic mechanism and functions in cells. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. Prokaryotic RNase H varies greatly in domain structures and substrate specificities. Prokaryotes and some single-cell eukaryotes do not require RNase H for viability.


Pssm-ID: 260010 [Multi-domain]  Cd Length: 139  Bit Score: 272.05  E-value: 1.40e-95
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   4 QVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSWIH 83
Cdd:cd09278    1 EIVIYTDGACLGNPGPGGWAAVIRYGDHEKELSGGEPGTTNNRMELTAAIEALEALKEPCPVTIYTDSQYVINGITKWIK 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 727178465  84 NWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:cd09278   81 GWKKNGWKTADGKPVKNRDLWQELDALLAGHKVTWEWVKGHAGHPGNERADRLANKAA 138
RnhA COG0328
Ribonuclease HI [Replication, recombination and repair];
3-141 1.03e-82

Ribonuclease HI [Replication, recombination and repair];


Pssm-ID: 440097 [Multi-domain]  Cd Length: 136  Bit Score: 239.36  E-value: 1.03e-82
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   3 KQVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALT--VPCAVTLSTDSQYVRQGITS 80
Cdd:COG0328    1 KMIEIYTDGACRGNPGPGGWGAVIRYGGEEKELSGGLGDTTNNRAELTALIAALEALKelGPCEVEIYTDSQYVVNQITG 80

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 727178465  81 WIHNWKKRGWktadkKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:COG0328   81 WIHGWKKNGW-----KPVKNPDLWQRLDELLARHKVTFEWVKGHAGHPGNERADALANKAL 136
RNase_H pfam00075
RNase H; RNase H digests the RNA strand of an RNA/DNA hybrid. Important enzyme in retroviral ...
 3-141 2.11e-72

RNase H; RNase H digests the RNA strand of an RNA/DNA hybrid. Important enzyme in retroviral replication cycle, and often found as a domain associated with reverse transcriptases. Structure is a mixed alpha+beta fold with three a/b/a layers.


Pssm-ID: 395028 [Multi-domain]  Cd Length: 141  Bit Score: 213.78  E-value: 2.11e-72
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465    3 KQVEIFTDGSCLGNPGPGGYGAILrYKQTEkTFSEGFRL-TTNNRMEMMAAIVALEALTVPCAVTLSTDSQYVRQGITSW 81
Cdd:pfam00075   2 KAVTVYTDGSCLGNPGPGGAGAVL-YRGHE-NISAPLPGrTTNNRAELQAVIEALKALKSPSKVNIYTDSQYVIGGITQW 79

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 727178465   82 IHNWKKRGWKTADK-KPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:pfam00075  80 VHGWKKNGWPTTSEgKPVKNKDLWQLLKALCKKHQVYWQWVKGHAGNPGNEMADRLAKQGA 140
RNase_HI_eukaryote_like cd09280
Eukaryotic RNase H is essential and is longer and more complex than their prokaryotic ...
 7-141 3.20e-49

Eukaryotic RNase H is essential and is longer and more complex than their prokaryotic counterparts; Ribonuclease H (RNase H) is classified into two families, type 1 (prokaryotic RNase HI, eukaryotic RNase H1 and viral RNase H) and type 2 (prokaryotic RNase HII and HIII, and eukaryotic RNase H2). RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner. RNase H is involved in DNA replication, repair and transcription. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. RNase H is widely present in various organisms, including bacteria, archaea and eukaryote and most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site (DEDD) residues and have the same catalytic mechanism and functions in cells. Eukaryotic RNase H is longer and more complex than in prokaryotes. Almost all eukaryotic RNase HI have highly conserved regions at their N-termini called hybrid binding domain (HBD). It is speculated that the HBD contributes to binding the RNA/DNA hybrid. Prokaryotes and some single-cell eukaryotes do not require RNase H for viability, but RNase H is essential in higher eukaryotes. RNase H knockout mice lack mitochondrial DNA replication and die as embryos.


Pssm-ID: 260012 [Multi-domain]  Cd Length: 145  Bit Score: 155.03  E-value: 3.20e-49
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   7 IFTDGSCLGNPGPG---GYGAilrY--KQTEKTFSE--GFRLTTNNRMEMMAAIVALE-ALTVPCA-VTLSTDSQYVRQG 77
Cdd:cd09280    2 VYTDGSCLNNGKPGaraGIGV---YfgPGDPRNVSEplPGRKQTNNRAELLAVIHALEqAPEEGIRkLEIRTDSKYAINC 78

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 727178465  78 ITSWIHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRH--TVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:cd09280   79 ITKWIPKWKKNGWKTSKGKPVKNQDLIKELDKLLRKRgiKVKFEHVKGHSGDPGNEEADRLAREGA 144
RNase_H_Dikarya_like cd13934
Fungal (dikarya) Ribonuclease H, uncharacterized; This family contains dikarya RNase H, many ...
 7-141 3.16e-32

Fungal (dikarya) Ribonuclease H, uncharacterized; This family contains dikarya RNase H, many of which are uncharacterized. Ribonuclease H (RNase H) enzymes are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. It is widely present in various organisms, including bacteria, archaea and eukaryotes. Most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site residues and have the same catalytic mechanism and functions in cells. RNase H is involved in DNA replication, repair and transcription. An important RNase H function is to remove Okazaki fragments during DNA replication.


Pssm-ID: 260014 [Multi-domain]  Cd Length: 153  Bit Score: 111.91  E-value: 3.16e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   7 IFTDGSCLGNPGPG---GYGAILRykqTEKTFSEGFRLT-------TNNRMEMMAAIVALEALT--------VPCAVTLS 68
Cdd:cd13934    2 VYIDGACRNNGRPDaraGYGVYFG---PDSSYNVSGRLEdtgghpqTSQRAELRAAIAALRFRSwiidpdgeGLKTVVIA 78

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 727178465  69 TDSQYVRQGITSWIHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRH-----TVKWEWVKGHaghpENERCDELAREAA 141
Cdd:cd13934   79 TDSEYVVKGATEWIPKWKRNGWRTSKGKPVKNRDLFELLLDEIEDLeeggvEVQFWHVPRE----LNKEADRLAKAAA 152
PRK06548 PRK06548
ribonuclease H; Provisional
 9-141 6.55e-30

ribonuclease H; Provisional


Pssm-ID: 75628 [Multi-domain]  Cd Length: 161  Bit Score: 106.44  E-value: 6.55e-30
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   9 TDGSCLGNPGPGGYGailrYKQTEKTF-SEGFRLTTNNRMEMMAA---IVALEALTVPcaVTLSTDSQYVRQGITSWIHN 84
Cdd:PRK06548  10 TDGSSLANPGPSGWA----WYVDENTWdSGGWDIATNNIAELTAVrelLIATRHTDRP--ILILSDSKYVINSLTKWVYS 83

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 727178465  85 WKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:PRK06548  84 WKMRKWRKADGKPVLNQEIIQEIDSLMENRNIRMSWVNAHTGHPLNEAADSLARQAA 140
RNase_H_like cd06222
Ribonuclease H-like superfamily, including RNase H, HI, HII, HIII, and RNase-like domain IV of ...
 7-138 2.15e-22

Ribonuclease H-like superfamily, including RNase H, HI, HII, HIII, and RNase-like domain IV of spliceosomal protein Prp8; Ribonuclease H (RNase H) enzymes are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. It is widely present in various organisms, including bacteria, archaea, and eukaryotes. Most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site residues and have the same catalytic mechanism and functions in cells. RNase H is involved in DNA replication, repair and transcription. An important RNase H function is to remove Okazaki fragments during DNA replication. RNase H inhibitors have been explored as anti-HIV drug targets since RNase H inactivation inhibits reverse transcription. This model also includes the Prp8 domain IV, which adopts the RNase fold but shows low sequence homology; domain IV is implicated in key spliceosomal interactions.


Pssm-ID: 259998 [Multi-domain]  Cd Length: 121  Bit Score: 85.83  E-value: 2.15e-22
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   7 IFTDGSCLGNPGPGGYGAILRYKQTEKT--FSEGFRLTTNNRMEMMAAIVALE-ALTVPC-AVTLSTDSQYVRQGITSWI 82
Cdd:cd06222    1 INVDGSCRGNPGPAGIGGVLRDHEGGWLggFALKIGAPTALEAELLALLLALElALDLGYlKVIIESDSKYVVDLINSGS 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 727178465  83 HNWKKrgwktadkkpvKNVDLWQRLDQAIQRHTVKWEWVKGhaghPENERCDELAR 138
Cdd:cd06222   81 FKWSP-----------NILLIEDILLLLSRFWSVKISHVPR----EGNQVADALAK 121
PRK08719 PRK08719
ribonuclease H; Reviewed
 40-141 2.52e-22

ribonuclease H; Reviewed


Pssm-ID: 236334 [Multi-domain]  Cd Length: 147  Bit Score: 86.45  E-value: 2.52e-22
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  40 RLTTNNRMEMMAAIVALEalTVPCAVTLSTDSQYVRQGITSWIHNWKKRGWKTADKKPVKNVDLWQRLDQAIQRHTVKWE 119
Cdd:PRK08719  46 RYTDNAELELLALIEALE--YARDGDVIYSDSDYCVRGFNEWLDTWKQKGWRKSDKKPVANRDLWQQVDELRARKYVEVE 123

                         90       100
                 ....*....|....*....|..
gi 727178465 120 WVKGHAGHPENERCDELAREAA 141
Cdd:PRK08719 124 KVTAHSGIEGNEAADMLAQAAA 145
Rnase_HI_RT_non_LTR cd09276
non-LTR RNase HI domain of reverse transcriptases; Ribonuclease H (RNase H) is classified into ...
 7-141 7.33e-16

non-LTR RNase HI domain of reverse transcriptases; Ribonuclease H (RNase H) is classified into two families, type 1 (prokaryotic RNase HI, eukaryotic RNase H1 and viral RNase H) and type 2 (prokaryotic RNase HII and HIII, and eukaryotic RNase H2). Ribonuclease HI (RNase HI) is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes. RNase HI has also been observed as an adjunct domain to the reverse transcriptase gene in retroviruses, long-term repeat (LTR)-bearing retrotransposons and non-LTR retrotransposons. RNase HI in LTR retrotransposons perform degradation of the original RNA template, generation of a polypurine tract (the primer for plus-strand DNA synthesis), and final removal of RNA primers from newly synthesized minus and plus strands. The catalytic residues for RNase H enzymatic activity, three aspartatic acids and one glutamic acid residue (DEDD), are unvaried across all RNase H domains. The position of the RNase domain of non-LTR and LTR transposons is at the carboxyl terminal of the reverse transcriptase (RT) domain and their RNase domains group together, indicating a common evolutionary origin. Many non-LTR transposons have lost the RNase domain because their activity is at the nucleus and cellular RNase may suffice; however LTR retrotransposons always encode their own RNase domain because it requires RNase activity in RNA-protein particles in the cytoplasm. RNase H inhibitors have been explored as an anti-HIV drug target because RNase H inactivation inhibits reverse transcription.


Pssm-ID: 260008 [Multi-domain]  Cd Length: 131  Bit Score: 69.17  E-value: 7.33e-16
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   7 IFTDGSclGNPGPGGYGAILRykQTEKTFSEGFRLTTNNRM---EMMAAIVALEALTVPCA----VTLSTDSQYVRQGIT 79
Cdd:cd09276    2 IYTDGS--KLEGSVGAGFVIY--RGGEVISRSYRLGTHASVfdaELEAILEALELALATARrarkVTIFTDSQSALQALR 77

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 727178465  80 SWihnwkkrgwkTADKKPVKNVDLWQRLDQAIQR-HTVKWEWVKGHAGHPENERCDELAREAA 141
Cdd:cd09276   78 NP----------RRSSGQVILIRILRLLRLLKAKgVKVRLRWVPGHVGIEGNEAADRLAKEAA 130
RNase_HI_like cd09279
RNAse HI family that includes archaeal, some bacterial as well as plant RNase HI; Ribonuclease ...
 5-141 1.52e-14

RNAse HI family that includes archaeal, some bacterial as well as plant RNase HI; Ribonuclease H (RNase H) is classified into two evolutionarily unrelated families, type 1 (prokaryotic RNase HI, eukaryotic RNase H1 and viral RNase H) and type 2 (prokaryotic RNase HII and HIII, and eukaryotic RNase H2). RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner. RNase H is involved in DNA replication, repair and transcription. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes and most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site (DEDD) residues and have the same catalytic mechanism and functions in cells. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. Most archaeal genomes contain only type 2 RNase H (RNase HII); however, a few contain RNase HI as well. Although archaeal RNase HI sequences conserve the DEDD active-site motif, they lack other common features important for catalytic function, such as the basic protrusion region. Archaeal RNase HI homologs are more closely related to retroviral RNase HI than bacterial and eukaryotic type I RNase H in enzymatic properties.


Pssm-ID: 260011 [Multi-domain]  Cd Length: 128  Bit Score: 65.96  E-value: 1.52e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   5 VEIFTDGSCLGNPGPGGYGAILRYKQTEKtFSEGFRL---TTNNRMEMMAAIVALE-ALTVPCA-VTLSTDSQYV-RQgi 78
Cdd:cd09279    1 WTLYFDGASRGNPGPAGAGVVIYSPGGEV-LELSERLgfpATNNEAEYEALIAGLElALELGAEkLEIYGDSQLVvNQ-- 77

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 727178465  79 tswIH-NWKkrgwktadkkpVKNVDLWQRLDQAIQR----HTVKWEWVKGHaghpENERCDELAREAA 141
Cdd:cd09279   78 ---LNgEYK-----------VKNERLKPLLEKVLELlakfELVELKWIPRE----QNKEADALANQAL 127
RNase_HI_bacteria_like cd09277
Bacterial RNase HI containing a hybrid binding domain (HBD) at the N-terminus; Ribonuclease H ...
 5-140 9.78e-11

Bacterial RNase HI containing a hybrid binding domain (HBD) at the N-terminus; Ribonuclease H (RNase H) enzymes are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. RNase H is involved in DNA replication, repair and transcription. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes and most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, Type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site (DEDD) residues and have the same catalytic mechanism and functions in cells. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. Prokaryotic RNase H varies greatly in domain structures and substrate specificities. Prokaryotes and some single-cell eukaryotes do not require RNase H for viability. Some bacteria distinguished from other bacterial RNase HI in the presence of a hybrid binding domain (HBD) at the N-terminus which is commonly present at the N-termini of eukaryotic RNase HI. It has been reported that this domain is required for dimerization and processivity of RNase HI upon binding to RNA-DNA hybrids.


Pssm-ID: 260009 [Multi-domain]  Cd Length: 133  Bit Score: 55.95  E-value: 9.78e-11
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   5 VEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRM-----EMMAAIVALEAltvpcAVTLSTDSQYVR---Q 76
Cdd:cd09277    1 VIAYVDGSYNKETKKYGYGVVIIKNGKEEEFSGSGNDPEYASMrnvagEIKGAMKAIKY-----AIENGIKKITIYydyE 75

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 727178465  77 GITSWI-HNWKkrgwktADKKPVKnvDLWQRLDQAIQRHTVKWEWVKGHAGHPENERCDELAREA 140
Cdd:cd09277   76 GIEKWAtGEWK------ANKELTK--EYKEFMQKYKKKIKIEFVKVKAHSGDKYNELADKLAKKA 132
rnhA PRK13907
ribonuclease H; Provisional
 5-140 6.01e-08

ribonuclease H; Provisional


Pssm-ID: 139967 [Multi-domain]  Cd Length: 128  Bit Score: 48.51  E-value: 6.01e-08
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   5 VEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTVP--CAVTLSTDSQYVRQGItswi 82
Cdd:PRK13907   2 IEVYIDGASKGNPGPSGAGVFIKGVQPAVQLSLPLGTMSNHEAEYHALLAALKYCTEHnyNIVSFRTDSQLVERAV---- 77

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 727178465  83 hnwkkrgwktaDKKPVKNVDLWQRLDQAIQrHTVKWE-----WVKGhaghPENERCDELAREA 140
Cdd:PRK13907  78 -----------EKEYAKNKMFAPLLEEALQ-YIKSFDlffikWIPS----SQNKVADELARKA 124
RNase_HI_RT_Bel cd09273
Bel/Pao family of RNase HI in long-term repeat retroelements; Ribonuclease H (RNase H) enzymes ...
 7-141 3.18e-07

Bel/Pao family of RNase HI in long-term repeat retroelements; Ribonuclease H (RNase H) enzymes are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. RNase H is widely present in various organisms, including bacteria, archaea and eukaryote. RNase HI has also been observed as adjunct domains to the reverse transcriptase gene in retroviruses, in long-term repeat (LTR)-bearing retrotransposons and non-LTR retrotransposons. RNase HI in LTR retrotransposons perform degradation of the original RNA template, generation of a polypurine tract (the primer for plus-strand DNA synthesis), and final removal of RNA primers from newly synthesized minus and plus strands. The catalytic residues for RNase H enzymatic activity, three aspartatic acids and one glutamic acid residue (DEDD), are unvaried across all RNase H domains. Phylogenetic patterns of RNase HI of LTR retroelements is classified into five major families, Ty3/Gypsy, Ty1/Copia, Bel/Pao, DIRS1 and the vertebrate retroviruses. Bel/Pao family has been described only in metazoan genomes. RNase H inhibitors have been explored as an anti-HIV drug target because RNase H inactivation inhibits reverse transcription.


Pssm-ID: 260005 [Multi-domain]  Cd Length: 131  Bit Score: 46.56  E-value: 3.18e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   7 IFTDGSCLGNpgpgGYGAIlrykqTEKTFSE---GFRLTTNNRMEMMAAIVALEaLTVPCAVTLSTDSQYVRQGITSWIH 83
Cdd:cd09273    2 VFTDGSSFKA----GYAIV-----SGTEIVEaqpLPPGTSAQRAELIALIQALE-LAKGKPVNIYTDSAYAVHALHLLET 71

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 727178465  84 NWKKRGWktadKKPVKNVDLWQRLDQAIQR-HTVKWEWVKGHAGHPE-----NERCDELAREAA 141
Cdd:cd09273   72 IGIERGF----LKSIKNLSLFLQLLEAVQRpKPVAIIHIRAHSKLPGplaegNAQADAAAKQAA 131
RNase_HI_RT_DIRS1 cd09275
DIRS1 family of RNase HI in long-term repeat retroelements; Ribonuclease H (RNase H) enzymes ...
 6-83 5.47e-06

DIRS1 family of RNase HI in long-term repeat retroelements; Ribonuclease H (RNase H) enzymes are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes. RNase HI has also been observed as adjunct domains to the reverse transcriptase gene in retroviruses, in long-term repeat (LTR)-bearing retrotransposons and non-LTR retrotransposons. RNase HI in LTR retrotransposons perform degradation of the original RNA template, generation of a polypurine tract (the primer for plus-strand DNA synthesis), and final removal of RNA primers from newly synthesized minus and plus strands. The catalytic residues for RNase H enzymatic activity, three aspartatic acids and one glutamic acid residue (DEDD), are unvaried across all RNase H domains. Phylogenetic patterns of RNase HI of LTR retroelements is classified into five major families, Ty3/Gypsy, Ty1/Copia, Bel/Pao, DIRS1 and the vertebrate retroviruses. The structural features of DIRS1-group elements are different from typical LTR elements. RNase H inhibitors have been explored as an anti-HIV drug target because RNase H inactivation inhibits reverse transcription.


Pssm-ID: 260007  Cd Length: 120  Bit Score: 43.04  E-value: 5.47e-06
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   6 EIFTDGSclGNpgpgGYGAILRYKQTEKTFSEGFRLTTNNRMEMMAAIVALEALTV---PCAVTLSTDS----QYV-RQG 77
Cdd:cd09275    1 VLFTDAS--LS----GWGAYLLNSRAHGPWSADERNKHINLLELKAVLLALQHFAAelkNRKILIRTDNttavAYInKQG 74


                 ....*.
gi 727178465  78 ITSWIH 83
Cdd:cd09275   75 GTSSPP 80
RNase_H_bacteria_like cd13935
RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence ...
 10-124 7.23e-06

RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner; This family includes bacterial ribonuclease H (RNase H) enzymes. RNases are divided into two major families, Type 1 and Type 2, based on amino acid sequence similarities and biochemical properties. RNase H is an endonuclease that cleaves the RNA strand of an RNA/DNA hybrid in a sequence non-specific manner in the presence of divalent cations. RNase H is widely present in various organisms, including bacteria, archaea and eukaryotes. Most prokaryotic and eukaryotic genomes contain multiple RNase H genes. Despite the lack of amino acid sequence homology, type 1 and type 2 RNase H share a main-chain fold and steric configurations of the four acidic active-site residues and have the same catalytic mechanism and functions in cells. RNase H is involved in DNA replication, repair and transcription. One of the important functions of RNase H is to remove Okazaki fragments during DNA replication. RNase H inhibitors have been explored as an anti-HIV drug target because RNase H inactivation inhibits reverse transcription.


Pssm-ID: 260015  Cd Length: 133  Bit Score: 42.89  E-value: 7.23e-06
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  10 DGSCLGNPGPGGYGAILRyKQTEKTFSEG-FRLTTNNRMEMMAAIVALEALTVPCA-VTLSTDSQYVRqgitSWIhnwKK 87
Cdd:cd13935    8 DAACSGNPGIVEYRGVDT-KTGEVLFHRGpFPGGTNNMGEFLAIVHALRYLKEKNSrKPIYSDSQTAI----AWV---KK 79

                         90       100       110
                 ....*....|....*....|....*....|....*..
gi 727178465  88 RGWKTADKKPVKNVDLWQRLDQAIqrhtvkwEWVKGH 124
Cdd:cd13935   80 KKAKSTLVRNEKNAEIFKLVDRAE-------EWLSTH 109
PRK07238 PRK07238
bifunctional RNase H/acid phosphatase; Provisional
 4-155 3.72e-05

bifunctional RNase H/acid phosphatase; Provisional


Pssm-ID: 180903 [Multi-domain]  Cd Length: 372  Bit Score: 42.27  E-value: 3.72e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465   4 QVEIFTDGSCLGNPGPGGYGAILRYKQTEKTFSE---GFRLTTNNRMEMMAAIVALEAL--TVPCAVTLSTDSQYVRQGI 78
Cdd:PRK07238   2 KVVVEADGGSRGNPGPAGYGAVVWDADRGEVLAEraeAIGRATNNVAEYRGLIAGLEAAaeLGATEVEVRMDSKLVVEQM 81

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 727178465  79 TSwihNWKKrgwKTADKKP--VKNVDLWQRLDQaiqrhtVKWEWVkghaghP--ENERCDELAREA-----AGKPTQDDV 149
Cdd:PRK07238  82 SG---RWKV---KHPDMKPlaAQARELASQFGR------VTYTWI------PraRNAHADRLANEAmdaaaGGEPWGPSA 143


                 ....*.
gi 727178465 150 GYQPEA 155
Cdd:PRK07238 144 AAADAD 149
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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